Average sea water temperature in December:
+35.8°F
| Minimum sea water temperature in December: | 39.6°F |
| Maximum sea water temperature in December: | 32.2°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 36.9°F. The highest and lowest sea temperatures during the month were 39.6°F and 34.5°F.
Monthly sea water temperature in Lahti, °F
Which Finland resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Espoo | 40.1°F | 38.5°F |
| Vantaa | 39.8°F | 38.2°F |
| Helsinki | 39.8°F | 38.2°F |
| Kotka | 39.2°F | 38.1°F |
| Turku | 38.9°F | 36.7°F |
| Koli National Park | 38.4°F | 36.7°F |
| Porvoo | 38.1°F | 36.5°F |
| Imatra | 38.0°F | 37.0°F |
| Pori | 37.5°F | 35.2°F |
| Juvaskyla | 37.4°F | 35.9°F |
| Lahti | 36.9°F | 35.3°F |
| Savolinna | 36.5°F | 35.6°F |
| Lappeenranta | 36.1°F | 35.4°F |
| Saariselka | 34.3°F | 33.8°F |
| Oulu | 34.3°F | 30.9°F |
| Vaasa | 34.3°F | 32.5°F |
| Seinajoki | 33.1°F | 31.6°F |
| Kemi | 32.0°F | 31.7°F |
Best time for vacation in Lahti
Lahti on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Lahti
Local time: 10:49
December 25, thursday
1200
39°F
E
14 mph
14 mph
1500
39°F
SE
14 mph
14 mph
1800
41°F
SE
15 mph
15 mph
2100
41°F
SE
14 mph
14 mph
December 26, friday
0000
37°F
S
14 mph
14 mph
0300
36°F
S
12 mph
12 mph
0600
34°F
S
11 mph
11 mph
0900
34°F
S
11 mph
11 mph
